Update tokrules.py
Update tokrules.py

[OpenSCAD] fix parser error for numbers with positive exponent >= 6
see forum: https://forum.freecadweb.org/viewtopic.php?f=3&t=54044
Fat-Zer/FreeCAD_sf_master,Fat-Zer/FreeCAD_sf_master,Fat-Zer/FreeCAD_sf_master,Fat-Zer/FreeCAD_sf_master,Fat-Zer/FreeCAD_sf_master